The 32-year-old net minder, who was replaced by Diego Lopez in the 14th minute of Tuesday's game in Istanbul, underwent a CT scan Wednesday at a hospital on Madrid's outskirts.

The medical bulletin did not indicate the recovery time, although all indications are it will not be lengthy. Casillas will likely be back in action in three or four days, the head coach of the Spanish powerhouse, Carlo Ancelotti, said in post-game comments.

The team captain was starting in an official Real Madrid match for the first time in eight months.

A five-time winner of the IFFHS Best Goalkeeper Award, Casillas broke his hand in a Copa del Rey match in January and has struggled to get back on the field for Real Madrid ever since.

Ramos hit Casillas with his forearm in the opening minutes of the game while the goalkeeper was leaping up to make a routine catch. Although Casillas had his ribs wrapped by the club's medical staff, he had to be replaced a few minutes later. EFE